The U.S. military Tuesday morning announced the death of a service member in a firefight that injured four more American troops in Afghanistan’s Nangarhar Province on Jan. 1 — the first U.S. combat fatality of 2018, and a stark reminder of the challenges facing U.S. troops in the year ahead.

116 days. The United States military went 116 consecutive days without losing a U.S. service member to enemy action. That ended April 8, 2015, when an Afghan soldier opened fire on coalition forces, killing at least one as of yet unidentified American, according to Dan Lamothe at the Washington Post.